Left his medical practice in South Africa to join identical twin brother Thomas in founding generic drug maker Hexal AG in 1986. They eventually built it into Germany's second-largest generic drug producer. Last February they sold that business as well as their 68% stake of U.S. Eon Labs to Novartis for $7.5 billion. At age 56 he isn't quite ready to retire and accepted an executive position at Sandoz, a generics division of Novartis. Rumored to love golf, skiing and sailing.